Shaft-finishing tool.



c. E. WILD-ER.

' SHAFT FINISHING TOOL. APPLICATION map 1AN.30. 151s.

LSUZJ, l, Patented Apr. 29, 1919.

gr x gvtmz CLINTON E. WILDEE, OF ERIE, PENNSYLVANIA snnrr-rrnrsnrnc rooL.

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Application filed January 30, 1918.

To all whom it may concern:

Be it known that I, CLINTON E. WILDER, a citizen of the United States, residing at Erie, in the county of Erieand State of Pennsylvania, have invented certain new and useful Improvements in Shaft-Finishing Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention relates to metal working tools, and consists in providing a tool adapted to finish shaft-rods which, owing to their diameter and length are difficult to turn accurately throughout their entire length.

The object of my invention is to provide a cutting instrument for turning rods and shafts, which will support the cutting tool upon the shaft or rod to be turned, so that the shaft or rod will not spring away from the cutting tool. I accomplish this object by providing a longitudinally divided cylinder which has secured within its interior bearing blocks adapted to fit on the shaft to be turned, and on one end of the longitudinally divided cylinder I provide cutting tools adapted to shave metal off of the shaft to be turned. This cylinder is held against rotation so that the shaft to be turned will rotate therein, and is caused to move along the shaft longitudinally thereby turning it down to the required size; the cutting tool being supported upon the shaft itself will not cause the shaft to springaway therefrom. These and other features of my in vention are hereinafter described and pointed out, reference being had to the accompanying drawings in which:

Figure 1, is a side elevation of a lathe having a shaft to be turned mounted therein with my improved shaft finishing tool thereon.

Fig. 2, is an enlarged end view of my shaft finishing tool showing the cutters thereon.

Fig. 3, is an opposite end view thereof.

Fig. 4:, is a plan view thereof.

In these drawings A indicates a shaft or rod to be finished. B indicates a longitudinally divided cylinder which has secured in the interior thereof bearing blocks C- CO-C by means of screws or bolts 6,

Specification of Letters Patent.

Patented Apr. 29, 119119.

Serial No. 214,485.

at one end thereof, there is a shoulder B which overlaps one of the bearing blocks G therein; the edge of this shoulder being preferably inclined to the axial line of the shaft A as shown in Fig. 2, and on this inclined face or edge of the shoulder B is secured a cutting blade E by means of bolts or screws e which pass through slots in the blade E thus permitting the blade E to be adjusted longitudinally. The shoulder B is provided with an ear B through which an adjusting screw F passes and engages the rear end of the blade E. The screw F is provided with a micrometer scale 7, and with a thumb screw head F, by means of which the screw F may be operated, and the micrometer scale turned with relation to the indicator f, thus forcing the cutting blade E toward the shaft A when desired.

One of the semi-cylindrical shells B is provided with an arm G which extends laterally therefrom and which is designed to rest upon a support H secured upon the traveling tool holder H of the lathe, as shown in Fig. 1, and by means of which the cylinder B is forced to travel longitudinally on the shaft A.

The semi-cylindrical shells B B are pro vided with notches b (see Figs. 2 and 4) cut into the ends thereof so that the shaft A may be calipered back of the cutting blade E. In operation one end of the rod or shaft is first turned to the desired finished diameter for a distance equal to the length of the cylinder B, and then the semi-cylinders B are placed in position as shown in Fig. 1, and the clamp bolts D secured in place. The cutting blades E are then adjusted and the arm G placed in position resting in the supporting bars H as shown in Figs. 1 and 4, and then the lathe is caused to rotate the shaft A in the direction indicated by the arrow in Figs. 2 and 3, the usual feed mechanism of the lathe carrying the tool carrier H longitudinally along the shaft A, thus forcing the cylinder B to travel therewith and finish-turn the shaft A.

It is obvious that with my improved device it is impossible for the shaft A to spring away from the blade E, thereby causing the shaft to have unequal diameters throughout its length.

Having thus fully shown and described my improved invention so as to enable others to utilize the same I do not desire to be limited to the exact construction and arrangements of mechanism herein shown and described, as it is obvious that many modifications can be made therein without departing from the scope of my invention;

faces 011 the inner ends thereof, means to move said bearing blocks inward and outward, a shoulder on the outside face of said body member and a cutting tool secured on said shoulder, substantially as set forth.

2. In a device of the class described, a.

'3 pair of semi-cylindrical shell members,

means to secure said members together, a plurality of bearing blocks secured inside of said members,- and adapted to engage a shaft placed therein and maintain said shells in spaced relation thereto, an inclined radial shoulder on each of said semi-cylindrical shells outside of said shell members, a cutting blade secured on each of said shoulders adapted to engage and cut a shaving from a shaft placed in said shell, means to adjust said cutting blades radially, and means to hold said shell members against rotation, substantially as described.

3. In a device of the class described, a pair of semi-cylindrical shell members, splines and grooves along the meeting edges thereof, coincident ears projecting from the edges of said shells, clamp bolts through said ears, bearing blocks within said shells, overhanging radial shoulders on one end of said members, an car on the outer end of said shoulders, an adjusting screw in said ears, a cutting blade longitudinally adjustable on said shoulders and adapted to be engaged by said adjusting screw, and means to prevent the rotation of said shell members, substantially as described. V

In testimony whereof I affix my signature.

CLINTON E.- WILDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, a. c." 

